| Name | Cost | Price |
|---|---|---|
| Corpse Traders | $0.23 | |
| Corpseweft | $0.15 | |
| Corrosion | $1.28 | |
| Corrosive Gale | $0.16 | |
| Corrosive Mentor | $7.82 | |
| Corrupt | $0.16 | |
| Corrupt Court Official | $0.11 | |
| Corrupted Crossroads | $0.33 | |
| Corrupted Grafstone | $0.30 | |
| Corrupted Key | $0.15 | |
| Corrupted Resolve | $0.27 | |
| Corrupted Shapeshifter | $0.20 | |
| Corrupted Zendikon | $0.13 | |
| Corruption of Towashi | $0.05 | |
| Corsairs of Umbar | $0.37 | |
| Cosima, God of the Voyage // The Omenkeel | — | |
| Cosmic Cube | $24.98 | |
| Cosmic Horror | $0.39 | |
| Cosmium Blast | $0.11 | |
| Cosmium Confluence | $0.20 | |
| Cosmogoyf | $0.76 | |
| Cosmos Charger | $0.25 | |
| Cosmotronic Wave | $0.14 | |
| Costly Plunder | $0.28 |